Original title: Air-pressure characteristics and visualization of bubbling effect in water resistance therapy
Authors: Radolf, Vojtěch ; Horáček, Jaromír ; Bula, Vítězslav ; Laukkanen, A. M.
Document type: Papers
Conference/Event: Engineering Mechanics 2014 /20./, Svratka (CZ), 2014-05-12 / 2014-05-15
Year: 2014
Language: eng
Abstract: This study investigates the influence of a widely used method in voice training and therapy, phonation into a resonance tube with the outer end submerged in water (‘water resistance therapy’ with bubbling effect). Acoustic and electroglottographic (EGG) signals and air pressures in the mouth cavity were registered and the formation of bubbles was studied using high speed camera. Bubbling frequency dominates in the spectra of the pressure signal being about 15 dB higher than the amplitude of the first harmonic, which reflects the fundamental frequency of the vocal folds’ vibration. Separation of the bubbles 10 cm under water surface starts when the buoyancy force acting on the bubble is approximately equal to the aerodynamic force in the tube.
Keywords: biomechanics of voice; phonation into tubes; voice therapy
Project no.: GPP101/12/P579 (CEP)
Funding provider: GA ČR
Host item entry: Engineering mechanics 2014, ISBN 978-80-214-4871-1, ISSN 1805-8248

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0239489

Permalink: http://www.nusl.cz/ntk/nusl-177622


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